If you're beginning to explore surrogacy, one of the first questions you may have is surprisingly simple:
Does the surrogate use her own egg?
In gestational surrogacy, the answer is no.
A gestational surrogate—also called a gestational carrier—carries an embryo created through IVF using eggs and sperm from the intended parents, donors, or a combination of both. The surrogate herself does not provide the egg used to create the embryo.
This distinction is one of the most important things to understand about modern surrogacy.
Let's break down exactly whose eggs are used, whether the surrogate shares DNA with the baby, and how the process works.
Gestational surrogacy is a form of assisted reproduction in which an embryo is created through in vitro fertilization (IVF) and transferred into the uterus of another person who carries the pregnancy.
According to the American Society for Reproductive Medicine (ASRM), the embryo may be created using gametes from the intended parent or parents, third-party donors, or both.
The gestational carrier provides the uterus and carries the pregnancy—but she does not provide the egg.
In other words:
Egg + Sperm → Embryo → Gestational Surrogate
The embryo already exists before it is transferred into the surrogate's uterus.
This is also how the CDC defines a gestational carrier: someone who carries an embryo formed using another woman's egg.
There are several possibilities.
For some heterosexual couples, embryos may be created using:
Intended mother's egg + intended father's sperm
The resulting embryo is then transferred to the gestational surrogate.
In this situation, the baby may be genetically related to both intended parents but not to the surrogate.
Sometimes intended parents use an egg donor.
For example:
Donor egg + intended father's sperm
or
Donor egg + donor sperm
The resulting embryo can then be transferred to the gestational carrier.
Donor eggs may be used for many different family-building circumstances, including when an intended parent cannot provide viable eggs or when male same-sex couples or single men pursue parenthood through IVF and surrogacy.
The CDC recognizes donor eggs, donor sperm, and donated embryos as forms of third-party reproduction.
Some intended parents already have frozen embryos before beginning the surrogate matching process.
Once a surrogate has been matched, appropriately screened, and medically and legally cleared, the fertility clinic can prepare for a frozen embryo transfer.
This is one reason intended parents sometimes choose to create and freeze embryos before beginning their surrogate search.
In gestational surrogacy, the surrogate does not contribute the egg or sperm used to create the embryo, so she is not the baby's genetic parent.
ASRM specifically describes a gestational carrier as someone who provides gestation but does not provide gametes for the pregnancy.
The baby's inherited DNA comes from the egg and sperm used to create the embryo.
For example:
The gestational carrier carries and supports the pregnancy, but she does not provide the genetic material used to create the embryo.
The confusion usually comes from the fact that there are two different concepts: gestational surrogacy and traditional surrogacy.
They are biologically very different.
In gestational surrogacy:
This is the model generally used by modern U.S. fertility programs. ASRM's 2026 policy report describes gestational-carrier arrangements as involving an IVF-created embryo with which the carrier has no genetic relationship.
Traditional—or genetic—surrogacy is different.
In this arrangement, the woman carrying the pregnancy also provides her own egg.
That means she has a genetic relationship with the resulting child.
ASRM notes that traditional surrogacy is uncommon in contemporary clinical practice and involves additional ethical and legal complexities.
So when most modern surrogacy agencies discuss a gestational surrogate, they are referring to someone who carries the pregnancy but does not provide the egg.
The medical process generally begins with IVF.
The intended parents and fertility clinic determine which eggs and sperm will be used.
These may come from:
Eggs are retrieved from the intended mother or egg donor and fertilized with sperm in the laboratory.
If fertilization and embryo development occur, embryos can be considered for transfer or cryopreservation.
The surrogate undergoes medical screening before transfer.
Depending on the treatment protocol, medications may be used to prepare the uterine lining for embryo transfer. ASRM notes that gestational carriers usually, though not always, receive hormonal support as part of preparing for and supporting an embryo-transfer pregnancy.
A selected embryo is transferred into the surrogate's uterus.
If implantation occurs and the pregnancy develops, the surrogate carries the pregnancy.
After pregnancy is confirmed, the gestational carrier initially receives follow-up through the fertility clinic before transitioning to regular obstetric care according to the medical team's plan.
She then carries the pregnancy and ultimately delivers the baby for the intended parent or parents.
This is where terminology matters.
If the person carrying the pregnancy also provides the egg used to create that same pregnancy, the arrangement would generally be considered traditional/genetic surrogacy rather than gestational surrogacy.
ASRM explicitly distinguishes the two: a gestational carrier provides gestation without providing the gamete, while a traditional surrogate provides both the egg and the pregnancy.
For intended parents researching U.S. surrogacy, understanding this distinction is particularly important because the medical and legal considerations can differ.
Yes.
Egg donation and gestational surrogacy can be two separate parts of the same family-building journey.
For example, embryos might be created using:
Egg Donor → Egg Retrieval
Intended Father → Sperm
IVF → Embryo Creation
Gestational Surrogate → Pregnancy
This type of arrangement may be relevant for:
ASRM recognizes that gestational-carrier arrangements may involve donor eggs, donor sperm, donated embryos, or gametes from one or both intended parents.
This question often comes up alongside the DNA question.
The surrogate's body plays an essential biological role in supporting the pregnancy, but that is different from being the source of the baby's inherited genetic material.
During pregnancy, the placenta facilitates exchanges such as oxygen, nutrients, and waste products between maternal and fetal circulations. However, the baby's inherited DNA was established when the egg and sperm combined to create the embryo.
So carrying a pregnancy does not make a gestational surrogate the baby's genetic parent.
Gestational surrogacy clearly separates two reproductive roles:
The genetic contributors provide the egg and sperm.
The gestational carrier provides the pregnancy.
ASRM notes that traditional surrogacy is rarely offered by most programs and presents greater ethical and legal complexity.
For this reason, contemporary fertility programs and surrogacy arrangements in the United States predominantly focus on gestational carriers.
Legal requirements nevertheless vary by state, so intended parents and surrogates should obtain independent advice from attorneys experienced in assisted reproduction.
Not in gestational surrogacy. The embryo is created using eggs from an intended parent or donor before being transferred to the gestational surrogate.
A gestational surrogate does not provide the egg or sperm used to create the embryo and therefore is not the baby's genetic parent.
Yes. If medically appropriate, embryos may be created using the intended mother's eggs and then transferred to a gestational carrier.
Yes. Donor eggs can be fertilized with sperm from an intended parent or donor, and a resulting embryo can then be transferred to a gestational carrier.
Gestational-carrier arrangements can involve donor eggs and donor sperm. The surrogate still does not provide the egg simply because she carries the pregnancy.
That is generally called traditional or genetic surrogacy, not gestational surrogacy.
If you remember only one thing from this article, make it this:
In gestational surrogacy, the surrogate carries the baby—but she does not provide the egg.
The embryo is created through IVF using eggs and sperm from the intended parents, donors, or both.
That means the roles of egg provider and gestational carrier are separate.
Understanding this distinction makes the rest of the surrogacy process—from embryo creation and surrogate matching to embryo transfer—much easier to understand.
At New Grace, we help intended parents understand each stage of the U.S. gestational surrogacy journey, including embryo preparation, surrogate matching, medical screening, legal coordination, embryo transfer, pregnancy, and delivery.
Whether you already have frozen embryos or are still exploring IVF, egg donation, and surrogacy, understanding your available options is the first step toward building the right plan for your family.
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This article is for informational purposes only and does not constitute medical or legal advice. Surrogacy laws, fertility treatment protocols, and individual circumstances vary. Please consult qualified fertility professionals and independent reproductive attorneys regarding your specific journey.
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